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How to calculate ROAS for ad campaigns

2026-05-19 15:36 · Paid Marketing

Learn the ROAS formula, see a simple campaign example, and understand when return on ad spend is useful for paid marketing decisions.

ROAS means return on ad spend. It is one of the simplest ways to judge whether a paid campaign is producing enough revenue for the amount you spend on ads.

The ROAS formula is:

ROAS = revenue from ads / ad spend

For example, if a campaign generated $6,000 in revenue and cost $2,000 in ad spend, the ROAS is 3.00x. You can also read that as $3.00 in revenue for every $1.00 spent on advertising.

To calculate ROAS, keep the revenue and ad spend window consistent. Do not compare one week of spend against one month of revenue unless that is your intended attribution model. Use the same channel, date range, and campaign grouping each time.

A higher ROAS usually means the campaign is more revenue efficient, but it does not automatically mean the campaign is profitable. Ecommerce sellers still need to subtract product cost, shipping, discounts, transaction fees, and returns. Service businesses may also need to account for sales team cost or fulfillment cost.

The ROAS Calculator at /tools/roas-calculator is useful for quick checks. After you calculate ROAS, compare the result with CPC and CPM to understand both traffic cost and revenue efficiency.